The Haag + Zeissler ROTATING Series 7501 is a versatile rotary union designed for the transfer of air, vacuum, and hydraulic oil in rotating mechanical systems. It supports a maximum rotational speed of 3500 rpm for DN 6 (1/8"), DN 8 (1/4"), DN 10 (3/8"), DN 15 (1/2"), and DN 20 (3/4"); 3000 rpm for DN 25 (1"); 2500 rpm for DN 32 (1 1/4") and DN 40 (1 1/2"); and 750 rpm for DN 50 (2"), providing stable operation across a wide range of connection sizes. The Series 7501 is designed for vacuum operation with a pressure range up to 0 bar, ensuring reliable and leak-free performance in both pneumatic and hydraulic applications. Engineered for precision sealing, durability, and smooth rotation, it delivers long service life in demanding industrial environments. Across North America, Europe, Asia, and worldwide, installation and connection configurations may possibly vary according to regional standards and specific system requirements.